8results about How to "Realize Nanoization" patented technology

The invention discloses a porous carbon-sodium ferric phosphate pyrophosphate composite material and a preparation method and application thereof, the composite material comprises porous carbon and sodium ferric phosphate pyrophosphate, and the sodium ferric phosphate pyrophosphate is distributed on the outer surface of the porous carbon and in porous carbon channels. The preparation method of the porous carbon-sodium ferric phosphate pyrophosphate composite material comprises the following steps: (1) preparing a sodium ferric phosphate pyrophosphate precursor solution; (2) uniformly mixing the ferric sodium pyrophosphate precursor solution obtained in the step (1) with porous carbon to obtain a precursor material flow; and (3) drying and roasting the precursor material flow obtained in the step (2) to obtain the porous carbon-phosphoric acid ferric sodium pyrophosphate composite material. According to the method, the composite electrode material with high rate performance can be obtained, and the energy density can be greatly improved when the composite electrode material is applied to a sodium ion capacitor.

The invention discloses a device and a method for generating nano-bubble fuel oil by utilizing oleophobic fibers and a Venturi flow field. The device comprises a Venturi tube, a nano-bubble generation reactor and a large bubble separator, the nano bubble generation reactor is filled with an oleophobic fiber module; the method comprises the steps that fuel oil flows through a Venturi tube to generate negative pressure to form liquid of pre-dissolved gas, the liquid enters a nano bubble generation reactor and flows through an oleophobic fiber module, micro-nano bubbles with large particle sizes are separated and discharged through an exhaust port in a large bubble separator, nano bubbles with small particle sizes stably exist in the liquid, and the micro-nano bubbles with small particle sizes stably exist in the liquid. The nanometer bubble fuel oil is obtained. The whole device system does not need high-energy-consumption equipment such as an external air pump and pressurized dissolved air, the structure is compact, the energy consumption is low, liquid of pre-dissolved air is formed only through negative pressure self-suction, and finally the liquid with the high concentration of D50lt is obtained; and therefore, the combustion efficiency can be remarkably improved, and pollutant emission can be reduced.

The invention belongs to the technical field of food fresh-keeping materials, and particularly relates to an aerogel type composite fresh-keeping pad as well as a preparation method and application thereof. The preparation method of the aerogel type composite fresh-keeping pad comprises the following steps: S1, mixing polyethylene glycol, oxalic acid and polyacrylic acid, and stirring at 70-80 DEG C to obtain a eutectic solvent; the method comprises the following steps: mixing a biomass raw material with a deep eutectic solvent, extracting, and filtering to obtain solid residues; s2, mixing the obtained solid residues with water, performing high-pressure homogenization treatment, mixing the obtained cellulose-containing suspension with a gelatin solution and a cross-linking agent, pouring the obtained mixed solution into a forming mold, performing freeze-drying treatment, and taking out to obtain the aerogel type composite fresh-keeping pad. The aerogel type composite fresh-keeping pad prepared by the method disclosed by the invention has good mechanical property, water absorption and antibacterial activity, and shows an excellent fresh-keeping effect in fresh-keeping of fish slices.

The invention relates to the technical field of propane catalytic oxidation, in particular to a silicon-based heterojunction material and a preparation method and application thereof based on mechanical force, the preparation method comprises the following steps: mixing copper oxide, silicon powder, titanium dioxide and water, grinding, and freeze-drying to obtain ground powder; and calcining the ground powder in a protective atmosphere to obtain the silicon-based heterojunction material. According to the invention, the silicon-mediated CuO-TiO2 nano heterojunction is constructed through a mechanical force assembly strategy. And nanocrystallization, uniform mixing and interface engineering of CuO and TiO2 are synchronously realized under the action of liquid phase shearing. In the process, the silicon powder not only serves as a doping agent, but also serves as a solid reducing agent, and selectively reduces Cu < 2 + > on the surface into Cu < + > under the driving of shearing force, so that an active structure with a Cu < + > / Cu < 2 + > redox cycle is constructed in situ, lattice distortion is induced, a large number of oxygen vacancies are generated, and the migration and activation capacity of oxygen is improved.

The invention relates to a preparation method and device of a nano-structure magnesium alloy block material, and adopts the technical scheme that an incompletely-compact semi-solid magnesium alloy block material repeatedly passes through a titanium mesh under the action of electric pulse and pressure, and the internal microstructure of the incompletely-compact semi-solid magnesium alloy block material is repeatedly cut, so that the nano-structure magnesium alloy block material is prepared. And finally, the magnesium alloy block material is completely densified at a certain temperature and pressure. The method has the advantages that 1, through the scheme of the invention, the construction of a magnesium alloy block material from a semi-solid state to a solid state and from a micron level to a nano level microstructure is realized; 2, in the scheme of the invention, for the preparation of a magnesium alloy block material, equipment with overlarge tonnage is not needed, and severe plastic deformation is realized; and 3, in the implementation process of the scheme, the magnesium alloy block material is always kept at medium and low temperature, grain growth is avoided, and the preparation efficiency is improved.

The preparation method comprises the following steps: preparing a manganese iron M ternary metal-glycerate precursor by adopting a solvothermal synthesis method, then mixing the manganese iron M ternary metal-glycerate precursor with a phosphorus source and a lithium source, carrying out high-energy ball milling, and carrying out primary CVD-like sintering and secondary hot pressed sintering to obtain the manganese iron lithium phosphate material. According to the preparation process disclosed by the invention, the lithium manganese iron phosphate material with high compaction density and excellent conductivity and cycling stability can be obtained, the production efficiency is high, and the preparation process has industrial application value.

The invention discloses a sodium ion capacitor positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing and coking heavy oil and an auxiliary agent to obtain a material flow A; then carrying out activating treatment on the material flow A and an activating agent, and washing and drying to obtain a material B; and mixing the material B with the precursor solution C, and drying and roasting the obtained mixture to obtain the sodium ion capacitor positive electrode material. The sodium ion capacitor positive electrode material obtained by the method has high specific capacity, and can greatly improve the energy density when being applied to a sodium ion capacitor.

The invention relates to a preparation method and application of a vanadium-titanium doped modified lithium manganese iron phosphate positive electrode material, and belongs to the technical field of lithium ion battery positive electrodes. The preparation method comprises the following steps: uniformly mixing a phosphoric acid source, a manganese source, an iron source, a lithium source, a carbon source, a vanadium source and / or a titanium source, a surfactant and a cosolvent, and carrying out ball milling and vacuum drying to obtain a lithium iron manganese phosphate precursor; and sintering the lithium manganese iron phosphate precursor at a high temperature of 600-750 DEG C for 6-12 hours to obtain the vanadium and / or titanium doped modified lithium manganese iron phosphate positive electrode material. An aluminum foil substrate is coated with the active substance components of the vanadium and / or titanium-doped modified lithium manganese iron phosphate positive electrode material, and the lithium battery positive electrode can be obtained. The doped modified lithium manganese iron phosphate positive electrode material is high in charge-discharge specific capacity, and has relatively high cycling stability and rate capability.